Chair armrest



FIG. 1 is a perspective view of a chair armrest showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left elevational view thereof;

FIG. 5 is a right elevational view thereof;

FIG. 6 is a top plan view thereof; and

FIG. 7 is bottom plan view thereof; and,

FIG. 8 is another perspective view showing the chair armrest on a seating unit. The seating unit has been shown in broken lines for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for chair armrest, as shown and described. 